Jennifer McCord 703-259-1779

Michael Murphy 703-259-1757


July 16, 2015

$108 million, five-mile widening to improve critical north-south commuter link

DULLES — The Virginia Department of Transportation (VDOT), Loudoun County and the Metropolitan Washington Airports Authority (MWAA) broke ground this morning on the jointly funded project to widen Route 606, a critical north-south link for commuters and businesses between Route 50, the Dulles Greenway and Route 28 in Loudoun County.

“Route 606 carries about three times the acceptable traffic volume, and is extremely congested in both directions during peak hours,” said Susan Shaw, Regional Transportation Program Manager for VDOT. “This project and partnership provides much-needed added capacity and safety improvements, and betters access for drivers to Dulles Airport, the future 606 Metro Station, the Dulles North Transit Center, and many other important centers in Ashburn, Sterling and surrounding areas.”

Under the partnership, VDOT contributes about $41.5 million, Loudoun County, approximately $41.2 million; and MWAA, about $25 million. MWAA has also contributed about 40 acres of land, valued at approximately $12 million, on which most of the widening is taking place. The total cost of the project is $107.7 million.

Route 606 will be reconstructed and widened from two lanes to a four-lane divided roadway, between Evergreen Mills Road and the Dulles Greenway (about five miles). Work also includes:

• Major utility relocations and acquisition of 55 parcels
• Signalized intersections and turn lanes
• A 10-foot-wide shared-use path on the west side
• A raised 28-foot-wide grass median
• A 257-foot-long twin-decked bridge over the Horsepen Dam spillway
• Improvements to Horsepen Dam
• Nine stormwater management ponds
• Three sound walls at Loudoun Valley Estates III
• Major drainage structures for Cabin Branch

This design-build project is being delivered by the team of Shirley Contracting Company and Dewberry Consultants, LLC, and is expected to be complete in Fall 2017.

Traffic Impacts
During construction, the speed limit along the project will be reduced from 55 miles per hour to 45 mph. Most work will take place weekdays with little traffic impact. When needed, traffic may be reduced to a single lane at night with flaggers to minimize traffic impacts. VDOT will advise drivers of nighttime work and major traffic shifts in advance.

Route 606 currently handles about three times the volume of traffic considered acceptable. Based on pavement width, shoulders and sight distance, an acceptable volume for Route 606 is 6,700 vehicles a day. Traffic counts in 2011 were 21,500 and are expected to grow to 35,250 a day by 2036.  

From 2007 to the end of 2010, a total of 158 accidents were reported on Route 606 between Evergreen Mills Road and the Dulles Greenway. That number had increased by 49 percent in 2010, indicating that road conditions on Route 606 are not designed for the high volume of traffic.

Widening Route 606 has been identified as a top transportation priority by the Loudoun County Board of Supervisors. Planning for widening the corridor began in the 1990s, and the section between Route 50 and Route 621 was completed in 2003. The project is part of the planned 18-mile “Dulles Loop” that would circle Dulles Airport by improving portions of Route 50, Route 606, and Route 28.

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Information in VDOT news releases was accurate at the time the release was published. For the most current information about projects or programs, please visit the project or program Web pages. You may find those by searching by keyword in the search Virginia DOT box above.

Page last modified: July 16, 2015